When the low-temperature storage tank is in operation, there are potential dangers such as leaks, overpressure, and explosions. If the hidden risks before these accidents are not discovered and addressed in time, they can escalate into serious incidents. Therefore, establishing a comprehensive inspection system and strictly enforcing it is crucial for ensuring the safe operation of the low-temperature storage tank.
Low-temperature storage tanks pose potential hazards such as leaks, overpressure, and explosions while in operation. Failing to promptly detect and address the hidden risks before such accidents occur can lead to severe incidents. Therefore, establishing and rigorously enforcing a comprehensive inspection system is crucial for ensuring the safe operation of low-temperature storage tanks. Daily inspections of low-temperature storage tanks typically include the following:
1. Check for valve and pipeline leaks, as well as any frosting or sweating on the casing.
2. Are all valves in normal open/close condition?
3. Are the instruments (level gauges, pressure gauges) functioning properly, and do the DCS display parameters match the field primary meters?
4. Is the storage tank pressure normal? When the pressure approaches or equals the maximum pressure, the vent valve must be opened to relieve pressure.
5. Is the liquid fill rate exceeding 95%?
6. Is the sealed gas normal for atmospheric pressure powder insulation storage tanks? (50mmH2O)
7. No flammable or explosive materials, as well as any debris, are permitted within proximity of the liquid oxygen storage tank, with clear signage in place.
8. No smoking or flames near the liquid oxygen storage tank.
9. Test the acetylene and total hydrocarbon content in the liquid oxygen storage tank at least once a week. The acetylene content must not exceed the process specifications; if it does, liquid oxygen must be discharged and replaced promptly for treatment.
10. Is the liquid oxygen tank properly grounded?
11. Ensure there is a certain amount of liquid inside the can if it is not to be unused for a long period, to avoid spending a long time refilling and cooling the can again.
12. Are the legs damaged, is the foundation sinking, tilting, or cracking, the condition of the fastening bolts, and any deformation of the tank?
13. Regularly check the vacuum level of the storage tank.
This product is a horizontal fixed vacuum powder insulation low-temperature storage tank, featuring a double-layer cylindrical structure. The inner container is designed for storing low-temperature liquefied natural gas, while the outer shell forms and protects the vacuum insulation space. The interlayer is filled with pearlescent sand and evacuated to create an effective insulation system. The design of the outer shell and support system can withstand the relevant external forces during manufacturing, transportation, installation, and use. The bottom of the tank is equipped with a complete set of valves, instruments, and safety devices for operation.
Safety:
One, stainless steel plates are all purchased from Taiyuan Iron and Steel Plant, the leading manufacturer of stainless steel plates in China, ensuring quality. The tube materials are sourced from Anhui Tianda Steel Tube, the No.1 supplier of domestic stainless steel seamless tubes.
Material specifications are as follows:GB150-2011Re-inspection of the Pressure Vessel, material cutting is performed using a CNC plasma cutting machine, with strict control over the geometric dimensions of the cylinder sections.
Section 3: Both longitudinal and circumferential seams are welded using submerged arc welding, resulting in good appearance and form, as well as internal lining treatment.100%XGamma Ray Inspection
Vacuum Degree:
One, the inner and outer surfaces of the stainless steel liner are degreased and pickled, while the carbon steel shell has been sandblasted and rust-removed on both inner and outer surfaces. This ensures the paint's adhesion, extends the paint's corrosion resistance lifespan, enhances the stainless steel plate's corrosion resistance, reduces the release of trapped air in the sandwich, thereby guaranteeing the longevity of the vacuum level.
Two, a unique dehydration pretreatment is performed on the pearl sand before loading, and the sandwich layers are heated and replaced with nitrogen gas, greatly reducing the sources of gas release.
Three, the process of using vacuum filling and positive pressure compaction for sand ensures the uniformity of the sandwiched pearlescent sand. The vibration rod compaction technique maximizes the filling amount of the pearlescent sand, guaranteeing the insulation effect of the sandwich layer.
Four: Utilizing a unique vacuum extraction process, significantly reduces the vacuuming time for the inner tank and its sandwiched layers, ensuring the vacuum degree of the sandwich exceeds the national standards. Guarantees the vacuum degree of the storage tank to be3～5No reprocessing required within the year.
Appearance:
One, the bending of the pipe is carried out on a CNC bending machine, strictly ensuring the geometric dimensions of the pipe. No elbows are used for connection, significantly reducing pipeline resistance and enhancing the aesthetic appearance of the outer piping system.
The paint used is from the world-renowned Jotun brand, with two coats of primer and two coats of topcoat, ensuring the longevity of the paint and the quality of the equipment's appearance.
